Photoelectric Sensors

  • The sensor is made of an emitter and receiver. Technic photoelectric sensors are classified into diffuse reflective sensors, retro reflective sensors and through beam sensors. 
  • Diffuse reflective sensors: Here the emitter and receiver are housed together in a unit and use the light reflected directly off the object for detection. 
  • The emitter continuously emits invisible modulate infrared beam which is detected by the receiver when the beam is obstructed by any opaque object